Check In gives you the ability with your mobile device to show your audience when you are at an event, school or place. This allows prospects, applicants, and Future Soldiers the ability to see exactly where you are. To do this you have to be logged into the Facebook app on your phone.1) From your profile homepage click in the "Check in" icon.2) At the top, in the search bar, type in the name of the location if not already displayed in the list.3) Update status with check in by tagging or just leaving a comment.4) Click "Post" in the top right. Now you can view your post on your wall.